How accurate are Mcgraw Hill Math level 2 tests?

Test Preparation SAT Subject Test Preparation
1

<p>I have been studying with Mcgaw hill math level 2. I have taken all of its tests(average score= 780). How accurate is Mcgraw hill? what do you think I'll score in the real test?</p>

2

<p>McGraw Hill = -50 - -70 on the real. Trust me, I have experience</p>